This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 2381 |
| 3 | 3851 |
| 4 | 20021 |
| 5 | 50051 |
| 6 | 52361 |
| 7 | 424271 |
| 8 | 470471 |
| 9 | 602141 |
| 10 | 2302301 |
| 11 | 6806801 |
| 12 | 16926911 |
| 13 | 17497481 |
| 14 | 69989921 |
| 15 | 78278201 |
| 16 | 183953771 |
| 17 | 242662421 |
| 18 | 468818351 |
| 19 | 2156564411 |
| 20 | 24912037151 |
| 21 | 43874931101 |
| 22 | 73769375681 |
| 23 | 131104243271 |
| 24 | 1360122864101 |
| 25 | 1943064533411 |
| 26 | 2635321709021 |
| 27 | 3075260848661 |
| 28 | 4078063299311 |